tree 6ea08897c8bce7d9cbc7b92da7a137fd936eaa3a
parent 29e3e2928c1ac75e8a3a5a65ce0af21c3d616d15
author Alison Maher <almaher@microsoft.com> 1618941572 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1618943985 -0700

[LayoutNG] Nested fixedpos in a multicol static position

When a fixedpos is nested in an OOF inside a multicol, the static
position can be incorrect. The reason being that when calling
PropagateOOFPositionedInfo() from NGOutOfFlowLayoutPart, the offset
of the OOF ancestor should be relative the current builder
(i.e. the multicol container) rather than relative to its
fragmentainer. To fix this, adjust the OOF offset using the
fragmentainer offset so that it is relative to the multicol when
calling PropagateOOFPositionedInfo().

Bug: 1200324
Change-Id: I3742efe2daf38e3f51b8f4abc8c332b8de117385
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2836226
Commit-Queue: Alison Maher <almaher@microsoft.com>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#874309}